The peptide categories you will see on labels

• Signal peptides — designed to mimic fragments produced when collagen is broken down, theoretically prompting cells to produce more.
• Carrier peptides — deliver trace minerals (most commonly copper) into the skin.
• Enzyme-inhibitor peptides — designed to slow specific enzymes involved in collagen breakdown.
• Neuropeptides — designed to influence neurotransmitter release at the neuromuscular junction in expression-line areas.

What the published research shows

A 2020 paper in the Journal of Cosmetic Dermatology by Lintner reported that a serum containing vitamin C, vitamin E and a matrix-repair tripeptide visibly reduced facial signs of ageing as measured by Primos optical analysis.^[1] Lintner is the chemist who originally developed the Matrixyl peptide family, which is widely cited in the cosmetic-peptide literature.

It is worth being clear about what peptide skincare can — and cannot — claim. Peptides in cosmetics work as topical agents. The level of effect achieved depends on formulation, concentration, vehicle, and individual factors. Cosmetic skincare improves the appearance of skin; it does not treat medical conditions.

Medik8's peptide line at Verdo

• Liquid Peptides® — a multi-peptide serum suitable for daily use morning and evening
• Liquid Peptides® Advanced MP — newer launch with additional peptide complexes
• Bakuchiol Peptides® — peptides paired with bakuchiol, our pregnancy-question alternative to vitamin A
• Niacinamide Peptides® — niacinamide + peptide combination
• Copper PCA Peptides® — copper-carrier peptide system
• Eyelift Peptides® — peptide-focused eye serum

How to layer peptides

• Apply after lightweight serums like vitamin C in the morning, or before retinoid in the evening.
• Pair with moisturiser to lock in.
• Peptides are generally well tolerated — they pair safely with vitamin A, vitamin C, exfoliating acids, niacinamide and SPF.